package?com.imocc.db; import?java.sql.DriverManager; import?java.sql.ResultSet; import?java.sql.Connection; import?java.sql.Statement; public?class?DBUtil?{ private?static?final?String?URL="jdbc:mysql://127.0.0.1:3306:imocc"; private?static?final?String?NAME="root"; private?static?final?String?PASSWORD="681879"; ?public?static?void?main(String?args[])throws?Exception{ Class.forName("com.mysql.jdbc.Driver"); Connection?conn=??DriverManager.getConnection(URL,NAME,PASSWORD); Statement?stmt=?conn.createStatement(); ResultSet?rs=stmt.executeQuery("select?user_name,age?from?imocc_goddess"); while(rs.next()){ System.out.println(rs.getString("user_name")+","+rs.getInt("age")); ?} ?} }錯誤信息：Exception in thread "main" java.lang.ClassNotFoundException: com.MySQL57.jdbc.Driver at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.imocc.db.DBUtil.main(DBUtil.java:15)